Linoleum, lincrusta, or like material.



UNITED STATES PATENT OFFICE.

AUGUST CASIMIR SGHWABTING, OF BREMEN, GERMANY, ASSIGNOR T0 REIS- 86HANDELS-AKTIENGESELLSCHAFT, OF BREMEN, GERMANY.

LINOLEUM, LINCRUS'IA, OR LIKE MATERIAL.

No Drawing.

Specification of Letters Patent.

Patented Nov. 25, 1913.

To all whom it may concern:

Be it known that I, AUGUST CAsIMIR SCHWARTING, manager, a subject of theGerman Emperor, residing at Bremen, Germany, have invented certain newand useful Improvements in Linoleum, Lincrusta, or like Material, ofwhich the following is a specification.

This invention consists in rice husks in a ground or pulverizedcondition being employed as a substitute for powdered cork or wood formaking linoleum, lincrusta and the like.

As applicant has found by a large series of experiments, ground ricehusks are specially adapted above all other substances for replacingground cork or wood in linoleum and the like material. By using groundrice husks, a perfectly dense, con tinuous surface, free from pores andas smooth as a mirror is obtained for the linoleum, to which, incontrast to ordinary linoleum material, not the smallest particle ofdust can adhere. A further advantage is the extraordinary cheapness oflinoleum made with ground rice husks. Ground rice husks permit in mixingthe linoleum material of the linoleum cement (the latter being a bindingmedium for the linoleum consisting of oxidized linseed oil or the like,sometimes mixed with gum or other suitable adhesive substances) beingreduced by more than 50% without the well known good properties of theproduct being substantially affected.

Linoleum or lincrusta has hitherto been made by mixing ground cork orwood with linoleum cement and coloring matters in the mixing machinesusually employed for this purpose in somewhat the following suitableproportionate quantities:

25 kilograms of ground cork or wood, 22-23 linoleum cement,

14 dyes or coloring matters.

As will be seen, the expensive linoleum cement here constitutes aprincipal constituent of the linoleum. When ground rice husks are usedinstead of ground cork or wood, the proportions of mixture which givethe best result are, on the other hand, as follows 25 kilograms ofground rice husks, 7-8 linoleum cement,

8 coloring matter.

As in this case the quantity of the dark colored linoleum cement isconsiderably smaller than hitherto, a considerably smaller quantity ofcoloring substances are also required in order to obtain the same shadeof color, as may be seen.

The ground rice husks are very tough and absorb less moisture andgrease. This latter property is particularly advantageous, because thegrease is not absorbed by the ground material itself but remains in andas the adhesive or binding material. This is also the reason for thesmaller consumption of linoleum cement.

The sheet of linoleum rolled from the improved material is scarcelyheavier than before, and the quantity of finished material obtained isnot less than previously.

In spite of less linoleum cement and coloring matters being employed,the improved material, in consequence of the properties of the groundrice husks, is quite as effective as that previously made, and is alsoconsiderably cheaper. The improved linoleum is not easily destroyed andmay last 20 years without alteration. As rice husks are of the nature oftalc, the machines in the mixing process run more easily than with theground cork and wood hitherto employed.

Of course there is no objection to the replacement of the ground cork orwood by ground rice husks being only a partialonc, or to all threematerials being used simultaneously.

Having now particularly described and ascertained the nature of my saidinvention and in what manner the same is to be performed, I declare thatwhat I claim is The herein described linoleum composition comprisingessentially pulverized rice husks and linoleum cement.

In testimony whereof I aflix my signature in presence of two witnesses.

AU GUST CASIMIR SGHWARTING.

Witnesses:

FREDERICK HOYERMANN, WILHELM S'rRUP.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner oi Patents,

Washington, D. 0.

